diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index dd612b49e..9431c0761 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -17,7 +17,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        os: [ ubuntu-18.04, ubuntu-20.04, ubuntu-22.04, macos-10.15, macos-11, macos-12, windows-2019, windows-2022 ]
+        os: [ ubuntu-18.04, ubuntu-20.04, ubuntu-22.04, macos-11, macos-12, windows-2019, windows-2022 ]
         ruby: [
           '1.9', '2.0', '2.1', '2.2', '2.3', '2.4', '2.5', '2.6', '2.7', '3.0', '3.1', '3.2', ruby-head,
           jruby, jruby-head,
diff --git a/README.md b/README.md
index 506f1051e..2a41184d4 100644
--- a/README.md
+++ b/README.md
@@ -43,7 +43,7 @@ The action works on these [GitHub-hosted runners](https://docs.github.com/en/act
 | Operating System | Supported |
 | ---------------- | --------- |
 | Ubuntu  | `ubuntu-18.04`, `ubuntu-20.04`, `ubuntu-22.04` |
-| macOS   | `macos-10.15`, `macos-11`, `macos-12` |
+| macOS   | `macos-11`, `macos-12` |
 | Windows | `windows-2019`, `windows-2022` |
 
 The prebuilt releases are generated by [ruby-builder](https://github.com/ruby/ruby-builder)
diff --git a/common.js b/common.js
index 0b8d18d7d..9a8a3d36e 100644
--- a/common.js
+++ b/common.js
@@ -163,7 +163,6 @@ export const supportedPlatforms = [
   'ubuntu-18.04',
   'ubuntu-20.04',
   'ubuntu-22.04',
-  'macos-10.15',
   'macos-11',
   'macos-12',
   'windows-2019',
diff --git a/dist/index.js b/dist/index.js
index 4aa939e96..ff60f92a6 100644
--- a/dist/index.js
+++ b/dist/index.js
@@ -471,7 +471,6 @@ const supportedPlatforms = [
   'ubuntu-18.04',
   'ubuntu-20.04',
   'ubuntu-22.04',
-  'macos-10.15',
   'macos-11',
   'macos-12',
   'windows-2019',